Fuel-air combustion adjustment



Dec. 2, 1969 J. N. ADAMS, JR, ET AL 3,481,681

FUEL-AIR COMBUSTION ADJUSTMENT Filed Jan. 4, 1968 ma s INVENTORS. JOHNN. ADAMS, JR BILL G. MART/N r BY United States Patent FUEL-AIRCOMBUSTION ADJUSTMENT John N. Adams, Jr., Bill G. Martin, and James 0.Brown, Tulsa, Okla., assignors to Combustion Engineering,

Inc., New York, N.Y., a corporation of Delaware Filed Jan. 4, 1968, Ser.No. 695,661 Int. Cl. F23c 7/00; F23d 13/40; Bb 7/12 US. Cl. 431-202 3Claims ABSTRACT OF THE DISCLOSURE A combustion device is mounted in asealed enclosure for safety. The adjustments of the fuel and airsupplied to the device are adjusted with mechanical linkage which isextended from their connection to the burner to a position external ofthe sealed enclosure.

BACKGROUND OF THE INVENTION Field of the invention The present inventionrelates to the remote control of elements supplied to support acombustion process. More particularly, the invention relates tomechanical linkage which is arranged as means whereby the fuel and airflowing to a burner is regulated through the wall of a sealed housingwithin which the burner is mounted.

Description of the prior art Linkage extended through isolating wallshas been developed in many forms. A linkage member rotated in a sealingstructure mounted in a wall represents one such form.

Burners which have an adjustment for air and a separate adjustment forfuel should have as few sealing structures as possible in the wall oftheir housing for access to both adjustments. A form of telescopinglinkage is a generally desirable concept. This form would facilitate theuse of a single sealing structure. A problem descends upon this conceptin keeping these adjustments independent of each other in operationwhile sharing a common sealing structure.

SUMMARY OF THE. INVENTION A principal object of the invention is to makeboth the fuel and air adjustments of a combustion burner through acommon sealing structure in a housing wall for the burner.

Another object is to make the adjustments independent of each other.

The present invention contemplates a mechanical linkage comprised of afirst elongated link rotated with threaded engagement through a sealedhousing wall and extending from connection with an air flow controlstructure of a burner to a point external the housing. A secondelongated link extends along the central bore of the first link withthreaded engagement to connect between a fuel flow control structure ofa burner and a point external of the housing. A first nut member isarranged to fix the first link to the housing after adjustment. A secondnut member fixes the two links together after adjustment.

Other objects, advantages and features of this invention will becomeapparent to one skilled in the art upon consideration of the writtenspecification, appended claims, and attached drawing, wherein;

The drawing is a partially sectioned elevation of a portion of a burnerand wall of a housing with a linkage embodying the present invention.

Patented Dec. 2, 1969 "ice DESCRIPTION OF THE PREFERRED EMBODIMENT .theproblem of adjusting fuel and air supplies to the burner from outsidethe housing.

The problem further contracts to extending some form of linkage throughwall 2 to actuate the regulating mechanisms for fuel and air. Fuel flowsinto the burner through conduit 3. Air is flowed into the burner betweenburner end 4 and the end 5 of a yoke member 6 which threads on a centralpost 7.

A needle valve, not shown, specifically regulates the flow of fuel fromconduit 3 into burner 1. Post 8 threads axially inside post 7 androtation of this post 8 determines the amount of fuel discharged intothe burner to propagate combustion.

The air, mixed with the fuel, is specifically regulated by the distancebetween end 4 and end 5. Air flows through this opening and mixes withthe fuel of conduit 3 within burner 1. Rotation of yoke 6 on post 7determines the size of the opening for this air flow.

The invention includes the linkage from yoke 6 and post 8 by which thesemembers are rotated to establish the desired flow rates for fuel and airinto burner 1. A screw 9 extends through wall 2 and connects to post 8through a bracket 10. Screw 9 telescopes within the axial base of screw11 which screw also extends through wall 1 for connection with yoke 6.Both screw 9 and screw 11 are accessible for rotation outside of wall 2.Located in this arrangement, they provide a system for adjusting thefuel and air of the burner without opening the housing.

The telescopic arrangement of screws 9 and 11 make it possible to extendthe assembly through a single opening in wall 2. Sealing about thesingle opening is relatively simple. A pad plate 12 of suitablethickness is sealed about an opening 13 in wall. A hole is formedthrough pad 12 and threaded to accommodate threaded screw 11. Thethreaded engagement is close enough to form the desired seal. A nut 14is threaded on the outside of screw 11 and can be brought against thesurface of plate 12 to lock screw 11 into position.

Screw 9 rotates within the axial bore of screw 11 to adjust the fuel.Nut 15 is threaded on the outside of this screw, and when broughtagainst the end of screw 11 locks the two Screws together.

The operation of the structure should now be obvious. Both nut 14 andnut 15 can be locked off and screws 11 and 9 independently adjusted toestablish the desired rate of flow to the burner. When the adjustmentsare correctly made, the nuts 14 and 15 can lock their screws in positionon plate 12. The housing remains sealed throughout the adjustment.

From the foregoing it will be seen that this invention is one welladapted to attain all of the ends and objects hereinabove set forth,together with other advantages which are obvious and which are inherentto the apparatus.

It will be understood that certain features and subcombinations are ofutility and may be employed without reference to other features andsubcombinations. This is contemplated by and is within the scope of theclaims.

As many possible embodiments may be made of the invention withoutdeparting from the scope thereof, it is to be understood that all matterherein set forth or shown in the accompanying drawing is to beinterpreted as illustrative and not in a limiting sense.

The invention having been described, what is claimed M 1. A remoteactuation system for an isloated industrial burner, including,

a housing for an industrial burner,

an industrial burner mounted with the housing,

valves on the burner which are mechanically actuated to regulate theflow of fuel and air into the burner,

screw members of elongated form and telescoped together and attached tothe valves so the valves will be individually actuated when the screwsare rotated,

a single packing for the telescoped screw members arranged between awall of the housing and the members, and

means for locking the screws in position relative to the housing.

2. The system of claim 1 including,

a valve for the fuel connected to the screw member telescoped within theaxial base of the other screw member, and

a yoke member on the outside of fuel valve and connected to the airvalve and the other screw member,

whereby each valve is individually actuated without interference withone another.

3. The system of claim 1 wherein,

the locking means is a nut threaded to the outside of each screw member,the nut on the external screw member brought against the housing walland the nut on the internal screw member brought against the end of theexternal screw member.

References Cited UNITED STATES PATENTS 1,833,193 11/1931 Wray 251225 XR3,123,127 3/1964 Willott 431--l86 FOREIGN PATENTS 1,224,697 2/ 1960France.

FREDERICK L. MATTESON, JR. Primary Examiner H. B. RAMEY, AssistantExaminer U.S. C1.X.R.'

